silicone molds
We buy a wide variety of supplies from DoreenBeads for crafts such as sewing, jewellery-making and macrame. Recently we bought some silicone molds to try with soap-making, candle-making, plaster of paris, etc, and these have been great too. We always pay slightly more for the fast shipping options, so I would recommend doing that so you get your supplies in a week or even less.